2 * IRC - Internet Relay Chat, ircd/ircd.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 1, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include "destruct_event.h"
31 #include "ircd_alloc.h"
32 #include "ircd_events.h"
33 #include "ircd_features.h"
35 #include "ircd_reply.h"
36 #include "ircd_signal.h"
37 #include "ircd_string.h"
38 #include "ircd_crypt.h"
70 #include <sys/socket.h>
72 #include <sys/types.h>
77 /*----------------------------------------------------------------------------
79 *--------------------------------------------------------------------------*/
80 extern void init_counters(void);
81 extern void mem_dbg_initialise(void);
83 /*----------------------------------------------------------------------------
85 *--------------------------------------------------------------------------*/
93 /*----------------------------------------------------------------------------
95 *--------------------------------------------------------------------------*/
96 struct Client me; /* That's me */
97 struct Connection me_con; /* That's me too */
98 struct Client *GlobalClientList = &me; /* Pointer to beginning of
100 time_t TSoffset = 0;/* Offset of timestamps to system clock */
101 int GlobalRehashFlag = 0; /* do a rehash if set */
102 int GlobalRestartFlag = 0; /* do a restart if set */
103 time_t CurrentTime; /* Updated every time we leave select() */
105 char *configfile = CPATH; /* Server configuration file */
106 int debuglevel = -1; /* Server debug level */
107 char *debugmode = ""; /* Server debug level */
108 static char *dpath = DPATH;
110 static struct Timer connect_timer; /* timer structure for try_connections() */
111 static struct Timer ping_timer; /* timer structure for check_pings() */
112 static struct Timer destruct_event_timer; /* timer structure for exec_expired_destruct_events() */
114 static struct Daemon thisServer = { 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0 };
119 /*----------------------------------------------------------------------------
121 *--------------------------------------------------------------------------*/
122 void server_die(const char *message)
124 /* log_write will send out message to both log file and as server notice */
125 log_write(LS_SYSTEM, L_CRIT, 0, "Server terminating: %s", message);
126 flush_connections(0);
127 close_connections(1);
131 /*----------------------------------------------------------------------------
133 *--------------------------------------------------------------------------*/
134 void server_panic(const char *message)
136 /* inhibit sending server notice--we may be panicing due to low memory */
137 log_write(LS_SYSTEM, L_CRIT, LOG_NOSNOTICE, "Server panic: %s", message);
138 flush_connections(0);
140 close_connections(1);
144 /*----------------------------------------------------------------------------
145 * API: server_restart
146 *--------------------------------------------------------------------------*/
147 void server_restart(const char *message)
149 static int restarting = 0;
151 /* inhibit sending any server notices; we may be in a loop */
152 log_write(LS_SYSTEM, L_WARNING, LOG_NOSNOTICE, "Restarting Server: %s",
154 if (restarting++) /* increment restarting to prevent looping */
157 sendto_opmask_butone(0, SNO_OLDSNO, "Restarting server: %s", message);
158 Debug((DEBUG_NOTICE, "Restarting server..."));
159 flush_connections(0);
163 close_connections(!(thisServer.bootopt & (BOOT_TTY | BOOT_DEBUG | BOOT_CHKCONF)));
165 execv(SPATH, thisServer.argv);
167 /* Have to reopen since it has been closed above */
170 log_write(LS_SYSTEM, L_CRIT, 0, "execv(%s,%s) failed: %m", SPATH,
173 Debug((DEBUG_FATAL, "Couldn't restart server \"%s\": %s",
174 SPATH, (strerror(errno)) ? strerror(errno) : ""));
179 /*----------------------------------------------------------------------------
180 * outofmemory: Handler for out of memory conditions...
181 *--------------------------------------------------------------------------*/
182 static void outofmemory(void) {
183 Debug((DEBUG_FATAL, "Out of memory: restarting server..."));
184 server_restart("Out of Memory");
188 /*----------------------------------------------------------------------------
190 *--------------------------------------------------------------------------*/
191 static void write_pidfile(void) {
194 if (thisServer.pid_fd >= 0) {
195 memset(buff, 0, sizeof(buff));
196 sprintf(buff, "%5d\n", (int)getpid());
197 if (write(thisServer.pid_fd, buff, strlen(buff)) == -1)
198 Debug((DEBUG_NOTICE, "Error writing to pid file %s: %m",
199 feature_str(FEAT_PPATH)));
202 Debug((DEBUG_NOTICE, "Error opening pid file %s: %m",
203 feature_str(FEAT_PPATH)));
211 * true - if the pid file exists (and is readable), and the pid refered
212 * to in the file is still running.
215 static int check_pid(void)
219 lock.l_type = F_WRLCK;
221 lock.l_whence = SEEK_SET;
224 if ((thisServer.pid_fd = open(feature_str(FEAT_PPATH), O_CREAT | O_RDWR,
226 return fcntl(thisServer.pid_fd, F_SETLK, &lock);
232 /*----------------------------------------------------------------------------
235 * Scan through configuration and try new connections.
237 * Returns the calendar time when the next call to this
238 * function should be made latest. (No harm done if this
239 * is called earlier or later...)
240 *--------------------------------------------------------------------------*/
241 static void try_connections(struct Event* ev) {
242 struct ConfItem* aconf;
244 struct ConfItem** pconf;
248 struct ConnectionClass* cltmp;
249 struct ConfItem* con_conf = 0;
251 const char* con_class = NULL;
253 assert(ET_EXPIRE == ev_type(ev));
254 assert(0 != ev_timer(ev));
257 Debug((DEBUG_NOTICE, "Connection check at : %s", myctime(CurrentTime)));
258 for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
259 /* Also when already connecting! (update holdtimes) --SRB */
260 if (!(aconf->status & CONF_SERVER) || aconf->address.port == 0 || aconf->hold == 0)
263 /* Also skip juped servers */
264 if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe))
267 /* Skip this entry if the use of it is still on hold until
268 * future. Otherwise handle this entry (and set it on hold until next
269 * time). Will reset only hold times, if already made one successfull
270 * connection... [this algorithm is a bit fuzzy... -- msa >;) ]
272 if (aconf->hold > CurrentTime && (next > aconf->hold || next == 0)) {
277 cltmp = aconf->conn_class;
278 confrq = get_con_freq(cltmp);
280 aconf->hold = next = 0;
282 aconf->hold = CurrentTime + confrq;
284 /* Found a CONNECT config with port specified, scan clients and see if
285 * this server is already connected?
287 cptr = FindServer(aconf->name);
289 if (!cptr && (Links(cltmp) < MaxLinks(cltmp)) &&
290 (!connecting /*|| (ConClass(cltmp) > con_class)*/)) {
292 * Check connect rules to see if we're allowed to try
294 if (0 == conf_eval_crule(aconf->name, CRULE_MASK)) {
295 con_class = ConClass(cltmp);
297 /* We connect only one at time... */
301 if ((next > aconf->hold) || (next == 0))
305 if (con_conf->next) { /* are we already last? */
306 /* Put the current one at the end and make sure we try all connections */
307 for (pconf = &GlobalConfList; (aconf = *pconf); pconf = &(aconf->next))
308 if (aconf == con_conf)
309 *pconf = aconf->next;
310 (*pconf = con_conf)->next = 0;
313 if (connect_server(con_conf, 0))
314 sendto_opmask_butone(0, SNO_OLDSNO, "Connection to %s activated.",
319 next = CurrentTime + feature_int(FEAT_CONNECTFREQUENCY);
321 Debug((DEBUG_NOTICE, "Next connection check : %s", myctime(next)));
323 timer_add(&connect_timer, try_connections, 0, TT_ABSOLUTE, next);
327 /*----------------------------------------------------------------------------
330 * TODO: This should be moved out of ircd.c. It's protocol-specific when you
331 * get right down to it. Can't really be done until the server is more
332 * modular, however...
333 *--------------------------------------------------------------------------*/
334 static void check_pings(struct Event* ev) {
336 int next_check = CurrentTime;
340 assert(ET_EXPIRE == ev_type(ev));
341 assert(0 != ev_timer(ev));
343 next_check += feature_int(FEAT_PINGFREQUENCY);
345 /* Scan through the client table */
346 for (i=0; i <= HighestFd; i++) {
347 struct Client *cptr = LocalClientArray[i];
352 assert(&me != cptr); /* I should never be in the local client array! */
355 /* Remove dead clients. */
357 exit_client(cptr, cptr, &me, cli_info(cptr));
361 max_ping = IsRegistered(cptr) ? client_get_ping(cptr) :
362 feature_int(FEAT_CONNECTTIMEOUT);
364 Debug((DEBUG_DEBUG, "check_pings(%s)=status:%s limit: %d current: %d",
366 IsPingSent(cptr) ? "[Ping Sent]" : "[]",
367 max_ping, (int)(CurrentTime - cli_lasttime(cptr))));
369 /* Ok, the thing that will happen most frequently, is that someone will
370 * have sent something recently. Cover this first for speed.
372 * If it's an unregisterd client and hasn't managed to register within
373 * max_ping then it's obviously having problems (broken client) or it's
374 * just up to no good, so we won't skip it, even if its been sending
378 if ((CurrentTime-cli_lasttime(cptr) < max_ping) && IsRegistered(cptr)) {
379 expire = cli_lasttime(cptr) + max_ping;
380 if (expire < next_check)
385 /* Unregistered clients pingout after max_ping seconds, they don't
386 * get given a second chance - if they were then people could not quite
387 * finish registration and hold resources without being subject to k/g
390 if (!IsRegistered(cptr)) {
391 assert(!IsServer(cptr));
392 if ((CurrentTime-cli_firsttime(cptr) >= max_ping)) {
393 /* Display message if they have sent a NICK and a USER but no
396 if (*(cli_name(cptr)) && cli_user(cptr) && *(cli_user(cptr))->username) {
397 send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
398 ":Your client may not be compatible with this server.");
399 send_reply(cptr, SND_EXPLICIT | ERR_BADPING,
400 ":Compatible clients are available at %s",
401 feature_str(FEAT_URL_CLIENTS));
403 exit_client_msg(cptr,cptr,&me, "Registration Timeout");
406 /* OK, they still have enough time left, so we'll just skip to the
407 * next client. Set the next check to be when their time is up, if
408 * that's before the currently scheduled next check -- hikari */
409 expire = cli_firsttime(cptr) + max_ping;
410 if (expire < next_check)
416 /* Quit the client after max_ping*2 - they should have answered by now */
417 if (CurrentTime-cli_lasttime(cptr) >= (max_ping*2) )
419 /* If it was a server, then tell ops about it. */
420 if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr))
421 sendto_opmask_butone(0, SNO_OLDSNO,
422 "No response from %s, closing link",
424 exit_client_msg(cptr, cptr, &me, "Ping timeout");
428 if (!IsPingSent(cptr))
430 /* If we havent PINGed the connection and we havent heard from it in a
431 * while, PING it to make sure it is still alive.
435 /* If we're late in noticing don't hold it against them :) */
436 cli_lasttime(cptr) = CurrentTime - max_ping;
439 sendrawto_one(cptr, MSG_PING " :%s", cli_name(&me));
442 char *asll_ts = militime_float(NULL);
443 sendcmdto_one(&me, CMD_PING, cptr, "!%s %s %s", asll_ts,
444 cli_name(cptr), asll_ts);
448 expire = cli_lasttime(cptr) + max_ping * 2;
449 if (expire < next_check)
453 assert(next_check >= CurrentTime);
455 Debug((DEBUG_DEBUG, "[%i] check_pings() again in %is",
456 CurrentTime, next_check-CurrentTime));
458 timer_add(&ping_timer, check_pings, 0, TT_ABSOLUTE, next_check);
462 /*----------------------------------------------------------------------------
464 * Side Effects: changes GLOBALS me, thisServer, dpath, configfile, debuglevel
466 *--------------------------------------------------------------------------*/
467 static void parse_command_line(int argc, char** argv) {
468 const char *options = "d:f:h:nktvx:";
471 if (thisServer.euid != thisServer.uid)
472 setuid(thisServer.uid);
474 /* Do we really need to santiy check the non-NULLness of optarg? That's
475 * getopt()'s job... Removing those... -zs
477 while ((opt = getopt(argc, argv, options)) != EOF)
479 case 'k': thisServer.bootopt |= BOOT_CHKCONF; break;
481 case 't': thisServer.bootopt |= BOOT_TTY; break;
482 case 'd': dpath = optarg; break;
483 case 'f': configfile = optarg; break;
484 case 'h': ircd_strncpy(cli_name(&me), optarg, HOSTLEN); break;
486 printf("ircd %s\n", version);
487 printf("Event engines: ");
492 printf("/dev/poll ");
499 printf("\nCompiled for a maximum of %d connections.\n", MAXCONNECTIONS);
506 debuglevel = atoi(optarg);
510 thisServer.bootopt |= BOOT_DEBUG;
514 printf("Usage: ircd [-f config] [-h servername] [-x loglevel] [-ntvk]\n");
515 printf("\n -n -t\t Don't detach\n -v\t display version\n -k\t exit after checking config\n\n");
516 printf("Server not started.\n");
522 /*----------------------------------------------------------------------------
524 *--------------------------------------------------------------------------*/
525 static void daemon_init(int no_fork) {
535 if ((fd = open("/dev/tty", O_RDWR)) > -1) {
536 ioctl(fd, TIOCNOTTY, 0);
545 /*----------------------------------------------------------------------------
546 * check_file_access: random helper function to make sure that a file is
547 * accessible in a certain way, and complain if not.
548 *--------------------------------------------------------------------------*/
549 static char check_file_access(const char *path, char which, int mode) {
550 if (!access(path, mode))
554 "Check on %cPATH (%s) failed: %s\n"
555 "Please create this file and/or rerun `configure' "
556 "using --with-%cpath and recompile to correct this.\n",
557 which, path, strerror(errno), which);
563 /*----------------------------------------------------------------------------
565 *--------------------------------------------------------------------------*/
566 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE)
567 static void set_core_limit(void) {
568 struct rlimit corelim;
570 if (getrlimit(RLIMIT_CORE, &corelim)) {
571 fprintf(stderr, "Read of rlimit core size failed: %s\n", strerror(errno));
572 corelim.rlim_max = RLIM_INFINITY; /* Try to recover */
575 corelim.rlim_cur = corelim.rlim_max;
576 if (setrlimit(RLIMIT_CORE, &corelim))
577 fprintf(stderr, "Setting rlimit core size failed: %s\n", strerror(errno));
583 /*----------------------------------------------------------------------------
584 * set_userid_if_needed()
585 *--------------------------------------------------------------------------*/
586 static int set_userid_if_needed(void) {
587 if (getuid() == 0 || geteuid() == 0 ||
588 getgid() == 0 || getegid() == 0) {
589 fprintf(stderr, "ERROR: This server will not run as superuser.\n");
597 /*----------------------------------------------------------------------------
600 * TODO: This should set the basic environment up and start the main loop.
601 * we're doing waaaaaaaaay too much server initialization here. I hate
602 * long and ugly control paths... -smd
603 *--------------------------------------------------------------------------*/
604 int main(int argc, char **argv) {
605 CurrentTime = time(NULL);
607 thisServer.argc = argc;
608 thisServer.argv = argv;
609 thisServer.uid = getuid();
610 thisServer.euid = geteuid();
613 mem_dbg_initialise();
616 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE)
620 umask(077); /* better safe than sorry --SRB */
621 memset(&me, 0, sizeof(me));
622 memset(&me_con, 0, sizeof(me_con));
623 cli_connect(&me) = &me_con;
626 parse_command_line(argc, argv);
629 fprintf(stderr, "Fail: Cannot chdir(%s): %s, check DPATH\n", dpath, strerror(errno));
633 if (!set_userid_if_needed())
636 /* Check paths for accessibility */
637 if (!check_file_access(SPATH, 'S', X_OK) ||
638 !check_file_access(configfile, 'C', R_OK))
641 if (!init_connection_limits())
644 close_connections(!(thisServer.bootopt & (BOOT_DEBUG | BOOT_TTY | BOOT_CHKCONF)));
646 event_init(MAXCONNECTIONS);
649 feature_init(); /* initialize features... */
651 set_nomem_handler(outofmemory);
653 if (!init_string()) {
654 log_write(LS_SYSTEM, L_CRIT, 0, "Failed to initialize string module");
668 /* we need this for now, when we're modular this
669 should be removed -- hikari */
675 log_write(LS_SYSTEM, L_CRIT, 0, "Failed to read configuration file %s",
680 if(thisServer.bootopt & BOOT_CHKCONF) {
681 fprintf(stderr, "Configuration file checked okay.\n");
685 debug_init(thisServer.bootopt & BOOT_TTY);
686 daemon_init(thisServer.bootopt & BOOT_TTY);
688 Debug((DEBUG_FATAL, "Failed to acquire PID file lock after fork"));
692 init_server_identity();
699 timer_add(timer_init(&connect_timer), try_connections, 0, TT_RELATIVE, 1);
700 timer_add(timer_init(&ping_timer), check_pings, 0, TT_RELATIVE, 1);
701 timer_add(timer_init(&destruct_event_timer), exec_expired_destruct_events, 0, TT_PERIODIC, 60);
703 CurrentTime = time(NULL);
706 cli_magic(&me) = CLIENT_MAGIC;
710 cli_serv(&me)->timestamp = TStime(); /* Abuse own link timestamp as start TS */
711 cli_serv(&me)->prot = atoi(MAJOR_PROTOCOL);
712 cli_serv(&me)->up = &me;
713 cli_serv(&me)->down = NULL;
714 cli_handler(&me) = SERVER_HANDLER;
716 SetYXXCapacity(&me, MAXCLIENTS);
718 cli_lasttime(&me) = cli_since(&me) = cli_firsttime(&me) = CurrentTime;
725 Debug((DEBUG_NOTICE, "Server ready..."));
726 log_write(LS_SYSTEM, L_NOTICE, 0, "Server Ready");